I am putting 4 - 48V lithium batteries in my golf cart style EV. I am running the batteries in parallel with the system negative coming from the 1st battery and the system positive coming from the 4th battery. I have a “fuel” indicator gauge that I am connecting to the 4th battery and a remote button (on/off) that I am connecting to the 1st battery.
I have seen several recommendations online on where to connect the cables for charging parallel battery banks, but wanted to see what information I could find on my own.